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<?php $abc = array( array('f_name'=>'Aron','m_i'=>'M'), array('f_name'=>'Abbey','m_i'=>'D'), array('f_name'=>'Alice','m_i'=>'P')); function build_sorter($key) { return function ($a, $b) use ($key) { return strnatcmp($a[$key], $b[$key]); }; } usort($array, build_sorter('f_name')); foreach ($array as $item) { echo $item['f_name'] . ', ' . $item['m_i'] . "\n"; }
Output for git.master, git.master_jit, rfc.property-hooks
Fatal error: Uncaught TypeError: usort(): Argument #1 ($array) must be of type array, null given in /in/HbVcM:13 Stack trace: #0 /in/HbVcM(13): usort(NULL, Object(Closure)) #1 {main} thrown in /in/HbVcM on line 13
Process exited with code 255.

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